1.选择题- (共23题)
如图所示,位于竖直面的物体A的质量mA=0.2kg,放在水平面的物体B的质量mB=1.0kg,绳子和滑轮间的摩擦均不计,且绳子的OB部分水平.OA部分竖直,A和B恰好一起匀速运动.取g=10m/s2,求;
某同学在做探究弹力和弹簧伸长的关系的实验中,设计了图甲所示实验装置,他先测出不挂钩码时弹簧的自然长度,再将钩码逐个挂在弹簧下端,每次都测出相应的弹簧总长度,将数据填在下面的表中.(弹簧始终在弹性限度内)
测量次数 | 1 | 2 | 3 | 4 | 5 | 6 |
弹簧弹力大小F/N | 0 | 0.49 | 0.98 | 1.47 | 1.96 | 2.45 |
弹簧总长x/cm | 0 | 7.16 | 8.34 | 9.48 | 10.85 | 11.75 |
如图所示,放在水平桌面上的木块A处于静止状态,所挂的砝码和托盘的总质量0.6kg,弹簧测力计读数为2N,滑轮摩擦不计,若轻轻取走盘中的部分砝码,使总质量减小到0.3kg,将会出现的情况是(g=10m/s2)( )
电磁打点计时器是一种使用{#blank#}1{#/blank#}(填“低压交流电或低压直流电或直流电”)源的计时仪器,它的工作电压是{#blank#}2{#/blank#}(填“220V”或“6V”).当电源频率是50赫兹时,它每隔{#blank#}3{#/blank#}秒打一次点.
如图,一质量为m的小球置于光滑斜面上,一轻质细绳一端系在小球上,跨过斜面顶端正上放的定滑轮,另一端用力F拉住,使得小球处于静止状态,现改变力F使得小球缓慢沿斜面上移直到斜面顶端,则下列说法正确的有( )
2.单项选择- (共17题)
A.the; the | B./; / | C.the; / | D./; the |
A.rains | B.has rained | C.rained | D.is raining |
A.approve my leaving | B.approve me to leave |
C.approve of my leaving | D.approve of me to leave |
A.to blame | B.blamed | C.blaming | D.to be blamed |
A.reminded | B.remembered | C.remained | D.returned |
—Because the suggestion he ____ has been turned down.
A.put away | B.put up | C.put down | D.put forward |
A.attended | B.being attended | C.having attended | D.attending |
A.is consisted of | B.consists of | C.consisting of | D.consisted of |
A.having considered | B.considered | C.to be considered | D.considering |
A.Amazed | B.Being amazed | C.Amazing | D.Having amazed |
A.simply | B.constantly | C.gradually | D.generally |
—_____ a concert, we also watched a football match.
A.Instead of | B.Apart from | C.In addition | D.Except for |
A.other than; one can | B.apart from; one can |
C.other than; can one | D.rather than; can one |
— _____, let’s do something for him.
A.If any | B.When necessary | C.When possible | D.If so |
—______. They are both good activities.
A.That’s all right |
B.It makes no difference to me |
C.Yes, I like them very much |
D.I’d prefer a bike ride |
—_____, I feel a bit cold.
A.Of course not | B.I’d rather you didn’t |
C.Go ahead | D.Yes, please |
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【1】题量占比
选择题:(23道)
单项选择:(17道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:0
5星难题:0
6星难题:16
7星难题:0
8星难题:1
9星难题:0